add ruby httpx echo api tests (#16729)

samples/client/echo_api/ruby-httpx/lib/openapi_client.rb

@@ -0,0 +1,56 @@
+=begin
+#Echo Server API
+
+#Echo Server API
+
+The version of the OpenAPI document: 0.1.0
+Contact: team@openapitools.org
+Generated by: https://openapi-generator.tech
+OpenAPI Generator version: 7.1.0-SNAPSHOT
+
+=end
+
+# Common files
+require 'openapi_client/api_client'
+require 'openapi_client/api_error'
+require 'openapi_client/version'
+require 'openapi_client/configuration'
+
+# Models
+require 'openapi_client/models/bird'
+require 'openapi_client/models/category'
+require 'openapi_client/models/default_value'
+require 'openapi_client/models/number_properties_only'
+require 'openapi_client/models/pet'
+require 'openapi_client/models/query'
+require 'openapi_client/models/string_enum_ref'
+require 'openapi_client/models/tag'
+require 'openapi_client/models/test_query_style_deep_object_explode_true_object_all_of_query_object_parameter'
+require 'openapi_client/models/test_query_style_form_explode_true_array_string_query_object_parameter'
+require 'openapi_client/models/data_query'
+
+# APIs
+require 'openapi_client/api/auth_api'
+require 'openapi_client/api/body_api'
+require 'openapi_client/api/form_api'
+require 'openapi_client/api/header_api'
+require 'openapi_client/api/path_api'
+require 'openapi_client/api/query_api'
+
+module OpenapiClient
+  class << self
+    # Customize default settings for the SDK using block.
+    #   OpenapiClient.configure do |config|
+    #     config.username = "xxx"
+    #     config.password = "xxx"
+    #   end
+    # If no block given, return the default Configuration object.
+    def configure
+      if block_given?
+        yield(Configuration.default)
+      else
+        Configuration.default
+      end
+    end
+  end
+end